lazelle



2 Sheets-Sheet 1.

(No Model.)

J. L. LAZELLE. GIRGUIT CLOSER EORBURGLAR ALARMS.

No. 289,665. Patented Dec. 4, 1883.

N. Finns. P Kflo-Uihognphr. Washington. a. c.

(No ModeL) 2 SheetsSheet 2. J. L. L'AZELLE. 1

CIRCUIT CLOSER FOR BURGLAR ALARMS; No. 289.665.

Patented Dec. 4, 1883.

N. PETERS. Phoko-Lithogmphlr, walhingtnn. c,

UNITED STATES MATENI FFICE.

JAMES L. LAZELLE OF JERSEY CITY, NEW JERSEY.

CIRCUIT-CLOSER FOR BU RGLAR-ALARMS.

SPECIFICATION forming part of Letters Patent No. 289,665, dated December 4, 1883.

Application filed September 10, 1883. (No model.)

To all whom it may concern.-

Be it known that I, JAMES L. LAZELLE, of Jersey City, in the county of Hudson and State of New J ersey,have invented an Improvement in Circuit-Closers for Burglar-Alarms, of which the following is a specification.

This invention relates to a rotary circuitbreaker adapted to burglar-alarms, &c. for ascertaining the location where the window or door has been opened.

This invention consists in a disk of insulating material upon a spindle and an arc of metal having radial ends passing into notches in the insulated disk, whereby the arc is held very firmly. I use circuit-closing springs and stops in connection with this disk and conducting-arc.

In the drawings I have represented in Fig a diagram of the circuit-connections.

The disk a is of insulating material, such as vulcanite or gelatinized fiber. This is connectedto the spindle b by a square and nut, c, and this spindle b passes through the insulating-plate d and terminates with a button, f, and it will generally also have a hand or pointer, e, and there will be marks upon the face of the instrument to indicate the electric circuit to be open or closed and the burglaralarm to be on or off. Itis preferable to have a metal bushing, g, in the plate d for the spindle bto turn in,as shown in Fig. 2; The pins z, upon the edge of the disk a, come into contact with the stop-3 and limit the movements of the circuit-breaker as it is turned in one direction or the other. The edge of the disk a is notched radially in two places, and the conducting-arc 0 is made with two radial ends entering thesenotches. This conductingarc is hence very easily and firmly affixed to the edge of the disk by simply pressing it laterally into place, and there may be two or more of these conducting-arcs on each disk. There are two spring-contacts, h and k, to each disk a, the ends of the springs preferably pointed toward each other, and their points of attachment being secured to the insulatingplate (2. It will now be seenthat when the circuit-breaker is turned by its button in one direction the conducting-arc will be moved from I beneath one or both the contact-springs his and break the circuit. The reverse movement will close the circuit, and the parts rubbing upon each other keep the surfaces clean.

The bell L is of ordinary character. It will usually be provided with an electro-magnet and circuit-breaking armature to the hammer, so as to ring continuously while the circuit is closed.

The wire 5 is to be regarded as the positive wire running to the base-plates of all the circuit-closing window and door springs in the burglar-alarm system.

The wire 6 is to be connected to all the springs in the circuit-closers on one floor or in one room, as the case may be. Itthence passes to the binding-post 22 and spring h in the rotary circuit-breaker allotted to that section of springs in athird group of window-springs marked library, thence to the binding-screw 42 and rotary circuit-closer and to the bell.

The wire 13 is shown as passing from the springs in the fourth group of window-springs marked dining-room, thence to bindingscrew 52, rotary closer, andmagneto-bell. By this arrangement the bell will be rung by either circuit-closing window-spring when acted upon by a burglar, and theparty whose attention is called by the bell will movefirst one circuitbreaker and then the other until the bell stops ringing. He then knows by the position of the circuit-breaker which room or place has been entered, and he acts accordingly. This arrangement of. branch circuits and circuitbreakers between the groups of window springs and bell is not dependent upon my peculiar rotary circuit-breaker, but may be used with switches to open and close the circuit.

I claim as my invention 1. The electric-circuit breaker formed of the disk a, of insulating material, notched radially the button f, by which the circuit-breaker is in its edge, andthe conducting-arc with radial turned, in combination with the insulated ends connected with such disk by its radial springs connected in the electric circuit, and I 5 ends passing into the notches, the supportingthe stops for limiting the motion of the electric- 5 spindle passing into such disk, and the button circuit breaker, substantially as specified. f, by which the circuit-breaker is turned, sub- Signed by me this 6th day of September, A. stantially as specified. D. 1883.

2. The disk a, of insulating material, notched radially in its edge, and the conducting-arc 10 with radial ends connected with such disk by Witnesses:

its radial ends passing into the notches, the GEO. T. PINcKNEY, supporting-spindle passing into such disk, and WILLIAM G. MOTT. I

J. L. LAZELLE. 

